企业的组织边界:基于不同理论视角的重新审视

企业边界理论是21世纪企业管理研究的一个重要领域。众多研究文献对企业边界的界定和分类有较大的差异。文章分别从交易费用理论、企业能力理论和组织认同理论这几个不同的理论视角重新审视效率边界、能力边界和认同边界三种不同的边界视角,主要以法定边界作为参照,研究三种企业边界的确定标准;并对三种边界的未来发展趋势提出了看法。

基于政策法规的乡村地区国土空间规划用途边界管理国际比较

为了促使乡村地区形成合理、可持续发展的国土空间,本文基于政策和法规分析了各国乡村地区国土空间规划用途边界划分依据和农用地管理体系。通过对不同国家乡村地区的政策、规划体系、法律体系的梳理,明确用途边界中城乡关系划分的依据、乡村规划编制的内容,进而分析农用地流转和开发许可的管理方式及侧重点。首先,相关的法规政策是合理发展国土空间的保障,各国在农业发展的不同阶段都有相应的政策。其次,规划是由国家和地方分级制定的,有不同的规划目标,如在国家层面,规划目标是提高农业生产能力、制定全球化农业市场发展战略、保护国内农业等;在地方层面,政府根据农业战略规划确立乡村整治项目的实施方针,并进行开发整治。最后,在城乡用途边界管理中,既有城乡一体的政策,也有严格区分城乡边界的法规,如欧美国家追求城乡一体化,东亚国家严格制定城市、乡村、生态边界的规划。总的来说,东亚国家与欧美国家有着不同的城乡规划理念与用途边界管理体系。

NOVEL IMMERSED BOUNDARY-LATTICE BOLTZMANN METHOD BASED ON FEEDBACK LAW

The lattice Boltzmann method （LBM） and the immersed boundary method （IBM） are alternative, com- putational techniques for solving complex fluid dynamics systems, and can take the place of the Navier-Stokes（N- S） equation. This paper proposes a novel immersed boundary-lattice Boltzmann method （IB-LBM） based on the feedback law. The method uses the immersed boundary concept in the LBM framework to capture the coupling between a body with complex geometry and a uniform fluid, Then, the flows around a stationary circular cylinder and two circular cylinders in a side by side arrangement are simulated by using the method. Results are agreed well with the benchmark data, so, the capability of the method for complex geometry is demonstrated. Different from the conventional IB-LBM, which uses the Hook＇s law or the direct forcing method to compute the interae- tion force, the method uses the feedback law--the feedback of velocity field and displacement information to calculate the force, thus ensuring the method has advantages of easy implementation and full parallelism.

The Dialectic of Borders and Multiculturalism in Naomi Nye＇s Habibi

This paper investigates how the Arab-American writer Naomi Nye addresses the dialectic between borders and multiculturalism in her award-winning young adult novel Habibi （1997）. Critiquing the essentialist view that presumes fixed boundaries for a culture, Nye promotes the alternative view that assumes individuals＇ power of defining and redefining their cultural identities in a multicultural society. The author argues that Nye＇s position is that borders/boundaries and geographical demarcations are flimsy, arbitrary and create divisions, animosities and hatred between people and nations whereas multiculturalism engenders feelings of reconciliation, friendship, and understanding. Though borders and boundaries can be divisive, cultural variety and hybridity can be inclusive. To counteract the argument of borders/boundaries, Nye posits the argument of multiculturalism. In this paper, the author intends to examine the assumptions of the physical and the cultural borders rhetoric in comparison with the multicultural approach narrative. It is the dialectic of these two opposing forces that shapes the events and the final outcome of the action and events of this novel

High-Accurate Transparent Boundary Conditions for Time-Dependent Quantum Wave Packet Method

Complex absorbing potential is usually required in a time-dependent wave packet method to accomplish the calculation in a truncated region.Usually it works effectively but becomes inefficient when the wave function involves translational energy of broad range,particularly involving ultra-low energy.In this work,a new transparent boundary condition(TBC)is proposed for the time-dependent wave packet method.It in principle is of spectral accuracy when typical discrete variable representations are applied.The prominent merit of the new TBC is that its accuracy is insensitive to the translational energy distribution of the wave function,in contrast with the complex absorbing potential.Application of the new TBC is given to one-dimensional particle wave packet scatterings from a barrier with a potential well,which supports resonances states.

Concept Design of a New Deep Draft Platform

The authors analyzed requirements for a new deepwater platform, from conceptual design to hydrodynamic analysis.The design incorporated Deep Draft Multi-Spar (DDMS) that allowed easy fabrication, reduced costs, and provided favorable motion performance.It also provided a dry tree system and other benefits.The conceptual design process included dimension estimation, general arrangements, weight estimation, weight distribution, stability analysis, etc.A high order boundary element method based on potential theory and the modified Morison equation was used to predict the hydrodynamic and viscous effects of this new concept platform.The response amplitude operators (RAOs) were acquired and compared with those of a typical Truss Spar.The response of the platform to the JONSWAP spectra of 3 different extreme ocean conditions was analyzed to evaluate the seakeeping ability of the new concept.The results revealed favorable motion performance due to all the degrees of freedom available.

论情势变更与币值波动——以《合同法解释(二)》第26条为中心

合同是当事人意思自治和合意的产物。商品合同价格是当事人双方就商品交换相关因素系统评价并参照合同成立时商品市场价格合成而生。商品市场价格由币值主导。币值波动扭曲商品市场价格,改变合同当事人之期得利益。币值波幅由国家央行掌控并具有财产分配属性和解构合同之功能,违约法定惩罚幅度由民事立法规定并具有界定合同法定边界之功能。币值波幅大于合同法定边界时,情势变更由此产生。情势变更发生后,首先应该适用意思自治和合意原则,由当事人协商解决情势变更引发的合同纠纷。在无法达成合意前提下,可根据币值运动规律将合同标的物价格调至当期市场价格以平衡当事人财产权益。

Variable-step integration method for milling chatter stability prediction with multiple delays

This paper analyzes the stability of milling with variable pitch cutter and tool runout cases characterized by multiple delays,and proposes a new variable-step numerical integration method for efficient and accurate stability prediction. The variable-step technique is emphasized here to expand the numerical integration method,especially for the low radial immersion cases with multiple delays. First,the calculation accuracy of the numerical integration method is discussed and the variable-step algorithm is developed for milling stability prediction for single-delay and multiple-delay cases,respectively. The milling stability with variable pitch cutter is analyzed and the result is compared with those predicted with the frequency domain method and the improved full-discretization method. The influence of the runout effect on the stability boundary is investigated by the presented method. The numerical simulation shows that the cutter runout effect increases the stability boundary,and the increasing stability limit is verified by the milling chatter experimental results in the previous research. The numerical and experiment results verify the validity of the proposed method.